Reply 1988

Adult Sung No-eul

Trash (ep. 18)

Adult Sung Deok-sun

A cardiac surgeon (ep. 8)

Sung Deok-sun / Sung Soo-yeon The middle child of her family, she is infamously ranked 999th in school and is the only girl in their group of five neighbourhood friends. Though not academically gifted, Deok-sun has a bright and compassionate personality. She cares deeply for her friends and classmates but feels lost without a "dream" to pursue. Deok-sun moves through the stages of her youth alongside her male friends, and the mystery of which of them she eventually marries is a continual point of tension for viewers throughout the series. She later becomes a flight attendant.

Sung No-eul Dong-il's only son and assistant in his schemes, No-eul is a kindhearted young teen with a poetic, dreamer's mind. He is also a good singer.

Adult Sung Bo-ra

A bad student

Kim Bo-young, Deok-sun's middle school friend (ep. 13)

A fortune teller

No-eul's girlfriend (ep. 8)

A snack shop owner (ep. 3)

(voice) as adult Sun-woo (ep. 20)

Wang Ja-hyun A reliable friend to Deok-sun and Mi-ok, Ja-hyun is focused on boys and becoming a hairstylist.

Bo-ra's boyfriend (ep. 8)

Deok-sun's colleague (ep. 18, 19 and 20)

Sun-young's older brother

(ep. 17)

A National Singing contest judge

A football teammate

Il-hwa is a kind woman who spends much of her time with the other moms and caring for her family. She worries about her children and husband and shows much of her care by cooking massive quantities of food to share with her family and the neighbourhood.

A fraud and security specialist at a bank, Dong-il fell into debt after lending money to a friend who never paid it back. He struggles to provide for his family as he wants to while paying off the debt, but does his best to give everything he can to his children. He and his wife, Il-hwa, argue a lot but love each other very deeply.

Bo-ra's friend (ep. 8)

Jang Mi-ok Born into a wealthy family, she is a good friend to Deok-sun and is practical and excitable. She gets in trouble with her family after she starts dating someone from Deok-sun's neighbourhood.

Adult Choi Taek

Sung Bo-ra Bo-ra is a tough-as-nails college student who wants to become a lawyer. She attended the Teacher's College of Seoul National University under the Department of Mathematics Education to save tuition fee although her test scores qualify her for the Department of Law. She participated in the June Democratic Struggle against the military regime under Chun Doo-hwan. While outwardly stoic, she has a warm heart and shows compassion to those who need it most. Where her younger sister Deok-sun struggles academically but excels in interpersonal relationships, Bo-ra is a stellar student who stumbles in social and emotional situations.

Sung-kyun is a kind and humorous man who runs an electronics store and formally worked at a Chinese restaurant as a delivery man. He loves to joke and play with the neighborhood kids, and generally keeps an air of joviality among the adults. Although he often seems childish and unhelpful to her, he adores his wife, Mi-ran, and hopes for good futures for his sons.

A strong lady with a tough past, Mi-ran is the indisputable empress of the Kim household. Worried and annoyed about his eldest son Jung-bong's constant academic failures punctuated by obsessions. Mi-ran can sometimes come off as short-tempered but this temper is really an expression of her anxiety and love for her children and family.

Kim Jung-bong A student who failed his college entrance exam six times, Jung-bong would rather collect posters and stamps, solve Rubik's cubes and play arcade games rather than studying and thinking about his future. He has an often child-like personality and is easily distracted. Nevertheless, Jung-bong is kind, thoughtful, compassionate, and easy to like. He happily cares for the neighbourhood kids including Jin-joo, Sun-woo's little sister. He is a surprisingly poetic and romantic. He later successfully attended the Department of Law of Sungkyungwan University.

Kim Jung-hwan Stoic and sarcastic but with a secretly sweet heart, Jung-hwan is called Jung-pal by his friends. Jung-hwan is smart and athletic, often taking on extra responsibility to fulfill the dreams of his older brother Jung-bong, who has a chronic heart condition. While Jung-hwan doesn't often share his emotions with others, he feels things deeply and uses his sarcasm and attitude as a shield. He develops feelings for Deok-sun early but is reluctant to admit his crush, even as the right timing slips away. He joined the Korea Air Force Academy and became a pilot for the Korean Air Force.

A kind young widow, Sun-young dotes on her children as much as possible to try to make up for their father's absence. She struggles with her mother-in-law and does her best to keep the family afloat. With a sunny personality and an upbeat disposition, she is always looking for the best side of any situation and can make even the most bear-like person laugh.

Sung Sun-woo A class president, caring brother, and dependable son to his widowed mother, Sun-woo is an ideal young man. He is devoted to his friends and dotes on his younger sister, Jin-joo. Sun-woo is thought to be the most "normal" among the five neighborhood friends. He harbours a secret crush on Deok-sun's older sister that lingers into adulthood. He later enters the Medical College of Yonsei University.

A widower, he is the owner of a watch and jewellry store called Bonghwangdang, at the entrance to the alley. Moo-sung moved to Ssangmundong after the death of his wife. He was adopted into the neighborhood family as he raised Taek by himself. Quiet and reserved, Moo-sung's unassuming exterior conceals hidden depths of emotion and compassion for his son, his friends, and the neighbourhood as a whole.

Choi Taek An internationally renowned genius baduk player, Taek is the quietest of his neighborhood friends. Taek dominates on the baduk board but struggles with simple everyday tasks. His baduk success has brought money and fame but has left him distant from his age group so he relies on his friends for companionship, grounding, and connection to other teens. Taek is generous to a fault and hesitant to make a fuss, but that hesitancy disappears in competition. However, when he realises that the person he cares for has another admirer, he has to weigh romance against friendship.

Ryu Jae-myung A dean at the local boys high school and biology teacher, he previously took Mathematics Education at the Teacher's College of Pusan National University in Busan, Gyeognam but transferred to the Biological Education Department. He becomes a tutor due to earn extra cash. Jae-myung once harboured dreams of becoming a dancer when he visited a dancing club at USFK's Busan Naval Base. Now focused on shaping the men of the future, he does his best to keep his son in check while still enjoying life.

Ryu Dong-ryong The neighbourhood clown, Dong-ryong loves to sing, dance, and play jokes on his friends. Like Deok-sun, Dong-ryong is not a natural academic, but his thoughtful insight and surprising wisdom serve him and his friends well. As the son of two working parents surrounded by tight-knit families, Dong-ryong sometimes feels neglected by his parents and makes up for their absence by acting out. He is known for his disgusting nature whilst with the group, much to the anger of the others. His nosy nature also means that he ends up knowing many of the neighbourhood's secrets before anyone else.